US Army Corps of Engineers
Northwestern Division

Columbia River

External Links

Reservoir Control Center Water Quality Program

The U.S. Army Corps of Engineers, Northwestern Division, Reservoir Control Center implements the water quality program associated with spill operations established in the Biological Opinions issued by NOAA for the Lower Columbia and Snake Rivers' hydroelectric dams. The Biological Opinion was established through the Endangered Species Act process and calls for water to be spilled from April through August each year at the hydroelectric dams as a measure to increase survival of endangered salmon and steelhead as they pass the dams to assist their migration to the ocean.

This web site provides information and data on the Division spill program and the resultant total dissolved gas (TDG) and temperature. This includes information on spill management, regional TDG studies, meetings, plans, reports and research studies. The Corps adjusts spill caps and spill levels in real time operations and there are spill guidance documents, reports and models that are used to aid in this spill cap change process.

District water quality programs cover the other water quality parameters such as nutrients, potassium, pH, conductivity, dissolved oxygen and others.

Program Documents & Reports

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Water Quality Reports

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By Project / Gauge ID (Alphabetical Order)

Anatone (ANQW) Today -1 Day -2 Days -3 Days
Bonneville (BON) Today -1 Day -2 Days -3 Days
Cascade Island (CCIW) Today -1 Day -2 Days -3 Days
Chief Joseph (CHJ) Today -1 Day -2 Days -3 Days
Chief Joseph Tailwater (CHQW) Today -1 Day -2 Days -3 Days
International Boundary (CIBW) Today -1 Day -2 Days -3 Days
Camas / Washougal (CWMW) Today -1 Day -2 Days -3 Days
Dworshak (DWQI) Today -1 Day -2 Days -3 Days
Grand Coulee Forebay (FDRW) Today -1 Day -2 Days -3 Days
Grand Coulee Tailwater (GCGW) Today -1 Day -2 Days -3 Days
Hungry Horse (HGHM) Today -1 Day -2 Days -3 Days
Ice Harbor Tailwater (IDSW) Today -1 Day -2 Days -3 Days
Ice Harbor (IHR) Today -1 Day -2 Days -3 Days
John Day (JDY) Today -1 Day -2 Days -3 Days
John Day Tailwater (JHAW) Today -1 Day -2 Days -3 Days
Libby Tailwater (LBQM) Today -1 Day -2 Days -3 Days
Lewiston (LEWI) Today -1 Day -2 Days -3 Days
Lower Granite Tailwater (LGNW) Today -1 Day -2 Days -3 Days
Little Goose (LGS) Today -1 Day -2 Days -3 Days
Little Goose Tailwater (LGSW) Today -1 Day -2 Days -3 Days
Lower Monumental (LMN) Today -1 Day -2 Days -3 Days
Lower Monumental Tailwater (LMNW) Today -1 Day -2 Days -3 Days
Lower Granite (LWG) Today -1 Day -2 Days -3 Days
McNary Tailwater (MCPW) Today -1 Day -2 Days -3 Days
McNary Forebay (MCQW) Today -1 Day -2 Days -3 Days
Pasco (PAQW) Today -1 Day -2 Days -3 Days
Peck (PEKI) Today -1 Day -2 Days -3 Days
Priest Rapids (PRD) Today -1 Day -2 Days -3 Days
Priest Rapids Tailwater (PRXW) Today -1 Day -2 Days -3 Days
Rock Island Tailwater (RIGW) Today -1 Day -2 Days -3 Days
Rock Island (RIS) Today -1 Day -2 Days -3 Days
Rocky Reach Tailwater (RRDW) Today -1 Day -2 Days -3 Days
Rocky Reach (RRH) Today -1 Day -2 Days -3 Days
The Dalles (TDA) Today -1 Day -2 Days -3 Days
The Dalles Tailwater (TDDO) Today -1 Day -2 Days -3 Days
Wanapum (WAN) Today -1 Day -2 Days -3 Days
Wanapum Tailwater (WANW) Today -1 Day -2 Days -3 Days
Wells (WEL) Today -1 Day -2 Days -3 Days
Wells Tailwater (WELW) Today -1 Day -2 Days -3 Days
Warrendale (WRNO) Today -1 Day -2 Days -3 Days

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Spill Data and Policy

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Anatone (ANQW) Today -1 Day -2 Days -3 Days
Bonneville (BON) Today -1 Day -2 Days -3 Days
Cascade Island (CCIW) Today -1 Day -2 Days -3 Days
Chief Joseph (CHJ) Today -1 Day -2 Days -3 Days
Chief Joseph Tailwater (CHQW) Today -1 Day -2 Days -3 Days
International Boundary (CIBW) Today -1 Day -2 Days -3 Days
Camas / Washougal (CWMW) Today -1 Day -2 Days -3 Days
Dworshak (DWQI) Today -1 Day -2 Days -3 Days
Grand Coulee Forebay (FDRW) Today -1 Day -2 Days -3 Days
Grand Coulee Tailwater (GCGW) Today -1 Day -2 Days -3 Days
Hungry Horse (HGHM) Today -1 Day -2 Days -3 Days
Ice Harbor Tailwater (IDSW) Today -1 Day -2 Days -3 Days
Ice Harbor (IHR) Today -1 Day -2 Days -3 Days
John Day (JDY) Today -1 Day -2 Days -3 Days
John Day Tailwater (JHAW) Today -1 Day -2 Days -3 Days
Libby Tailwater (LBQM) Today -1 Day -2 Days -3 Days
Lewiston (LEWI) Today -1 Day -2 Days -3 Days
Lower Granite Tailwater (LGNW) Today -1 Day -2 Days -3 Days
Little Goose (LGS) Today -1 Day -2 Days -3 Days
Little Goose Tailwater (LGSW) Today -1 Day -2 Days -3 Days
Lower Monumental (LMN) Today -1 Day -2 Days -3 Days
Lower Monumental Tailwater (LMNW) Today -1 Day -2 Days -3 Days
Lower Granite (LWG) Today -1 Day -2 Days -3 Days
McNary Tailwater (MCPW) Today -1 Day -2 Days -3 Days
McNary Forebay (MCQW) Today -1 Day -2 Days -3 Days
Pasco (PAQW) Today -1 Day -2 Days -3 Days
Peck (PEKI) Today -1 Day -2 Days -3 Days
Priest Rapids (PRD) Today -1 Day -2 Days -3 Days
Priest Rapids Tailwater (PRXW) Today -1 Day -2 Days -3 Days
Rock Island Tailwater (RIGW) Today -1 Day -2 Days -3 Days
Rock Island (RIS) Today -1 Day -2 Days -3 Days
Rocky Reach Tailwater (RRDW) Today -1 Day -2 Days -3 Days
Rocky Reach (RRH) Today -1 Day -2 Days -3 Days
The Dalles (TDA) Today -1 Day -2 Days -3 Days
The Dalles Tailwater (TDDO) Today -1 Day -2 Days -3 Days
Wanapum (WAN) Today -1 Day -2 Days -3 Days
Wanapum Tailwater (WANW) Today -1 Day -2 Days -3 Days
Wells (WEL) Today -1 Day -2 Days -3 Days
Wells Tailwater (WELW) Today -1 Day -2 Days -3 Days
Warrendale (WRNO) Today -1 Day -2 Days -3 Days

Historical Data

These files represent historical data for the period-of-record stored by the Corps of Engineers, through June 30, 2009.
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These files represent hourly generation data for the period-of-record stored by the Corps of Engineers, through 30-Jun-2009 for the following projects:

Individual files are gzipped (www.gzip.org), and are also all contained in a single .zip archive.

For data from 1-Jul-2009 to the present, see our dataquery program.

Each .zip file contains multiple PDF files for the given water year. Right click to download the file.